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PDF FOD0721 Data sheet ( Hoja de datos )

Número de pieza FOD0721
Descripción (FOD07xx) 25Mbit/sec Logic Gate Optocoupler
Fabricantes Fairchild Semiconductor 
Logotipo Fairchild Semiconductor Logotipo



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No Preview Available ! FOD0721 Hoja de datos, Descripción, Manual

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FOD0721, FOD0720, FOD0710
High CMR, 25Mbit/sec Logic Gate Optocoupler
May 2008
Features
20kV/µs minimum CMR
40ns max. propagation delay
Data Rate, Non-Return Zero Coding
– 25Mbit/sec (FOD0721 and FOD0720)
– 12.5Mbit/sec (FOD0710)
Pulse Width Distortion
– 6ns (FOD0721)
– 8ns (FOD0720 and FOD0710)
+5V CMOS compatibility
Extended industrial temperate range
– -40 to 100°C temperature range
Safety and regulatory approvals
– UL1577, 3750 VACrms for 1 min. (File #E90700,
Volume 2)
– IEC60747-5-2 pending approval
Applications
Industrial fieldbus communications
– Profibus, DeviceNet, CAN, RS485
Programmable logic control
Isolated data acquisition system
Description
The FOD0721/0720/0710 family utilizes Fairchild’s
patented coplanar packaging technology, Optoplanar®,
and optimized IC design to guarantee minimum 20kV/µs
Common Mode Noise Rejection (CMR) rating.
These high-speed logic gate optocouplers consist of a
high-speed AlGaAs LED driven by a CMOS IC coupled
to a CMOS detector IC, comprising an integrated photo-
diode, a high-speed transimpedance amplifier and a
voltage comparator with an output driver. The CMOS
technology coupled to the high efficiency of the LED
achieves low power consumption as well as very high
speed (40ns propagation delay, 6ns pulse width
distortion).
These devices are available in a compact 8-pin small
outline package.
Package Dimensions
0.164 (4.16)
0.144 (3.66)
0.202 (5.13)
0.182 (4.63)
0.143 (3.63)
0.123 (3.13)
0.010 (0.25)
0.006 (0.16)
0.021 (0.53)
0.011 (0.28)
0.008 (0.20)
0.003 (0.08)
0.050 (1.27)
TYP
0.244 (6.19)
0.224 (5.69)
Lead Coplanarity : 0.004 (0.10) MAX
Note:
All dimensions are in inches (millimeters)
©2004 Fairchild Semiconductor Corporation
FOD0721, FOD0720, FOD0710 Rev. 1.0.7
www.fairchildsemi.com

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FOD0721 pdf
Switching Characteristics (TA = -40°C to 100°C and 4.5V VDD 5.5V, all typicals are at TA = 25°C, VDD = 5V)
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Symbol Parameter
Test Conditions Min. Typ. Max. Unit
tPHL Propagation Delay Time to
Logic Low Output
CL = 15pF
21 40 ns
tPLH Propagation Delay Time to
Logic High Output
CL = 15pF
23 40 ns
PWD
Data Rate
Pulse Width Distortion, | tPHL – tPLH |
FOD0710
PW = 80ns, CL = 15pF
FOD0720
PW = 40ns, CL = 15pF
FOD0721
PW = 40ns, CL = 15pF
FOD0710
2 8 ns
2 8 ns
2 6 ns
12.5 Mb/s
FOD0720, FOD0721
25 Mb/s
tPSK Propagation Delay Skew
CL = 15pF(3)
20 ns
tR Output Rise Time (10%–90%)
5 ns
tF Output Fall Time (90%–10%)
4.5 ns
|CMH| Common Mode Transient
Immunity at Output High
VI = VDD1, VO > 0.8 VDD2
VCM = 1000V(4)
20
40
kV/µs
|CML| Common Mode Transient
Immunity at Output Low
VI = 0V, VO < 0.8,
VCM = 1000V(4)
20 40
kV/µs
Notes:
3. tPSK is equal to the magnitude of the worst case difference in tPHL and/or tPLH that will be seen between units at any given
temperature within the recommended operating conditions.
4. Common mode transient immunity at output high is the maximum tolerable (positive) dVcm/dt on the leading edge
of the common mode impulse signal. Vcm, to assure that the output will remain high. Common mode transient
immunity at output low is the maximum tolerable (negative dVcm/dt on the trailing edge of the common pulse
signal, Vcm, to assure that the output will remain low.
©2004 Fairchild Semiconductor Corporation
FOD0721, FOD0720, FOD0710 Rev. 1.0.7
5
www.fairchildsemi.com

5 Page





FOD0721 arduino
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VDD1 = 5V
0.1µF
0V–5V
Pulse width = 40ns
Duty Cycle = 50%
1
2
3
4
8
7 0.1µF
VO
6
CL
5
VDD2 = 5V
Input
tPLH
VIN
tPHL
5V
50%
Output
90%
VOUT 10%
tR
VOH
2.5V
VOL
tF
Figure 16. Test Circuit for Propogation Delay Time and Rise Time, Fall Time
VDD1 = 5V
0.1µF
SW
AB
1
2
3
4
+–
VCM
8
7 0.1µF
VDD2 = 5V
VO
6
CL
5
GND
VOH
VOL
1kV VCM
Switching Pos. (A) VIN = 5V
0.8 x VDD
0.8V
Switching Pos. (B) VIN = 0V
CMH
CML
Figure 17. Test Circuit for Instantaneous Common Mode Rejection Voltage
©2004 Fairchild Semiconductor Corporation
FOD0721, FOD0720, FOD0710 Rev. 1.0.7
11
www.fairchildsemi.com

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